/**
 * author: Di (微信小程序开发工程师)
 * organization: WeAppDev(微信小程序开发论坛)(http://weappdev.com)
 *               垂直微信小程序开发交流社区
 *
 * github地址: https://github.com/icindy/wxParse
 *
 * for: 微信小程序富文本解析
 * detail : http://weappdev.com/t/wxparse-alpha0-1-html-markdown/184
 */

/**
 * utils函数引入
 **/
import showdown from './showdown';
import HtmlToJson from './html2json';

/**
 * 配置及公有属性
 **/
/**
 * 主函数入口区
 **/
function wxParse(bindName = 'wxParseData', type = 'html', data = '<div class="color:red;">数据不能为空</div>', target, imagePadding) {
    var that = target;
    var transData = {};//存放转化后的数据
    if (type == 'html') {
        transData = HtmlToJson.html2json(data, bindName);
        console.log(JSON.stringify(transData, ' ', ' '));
    } else if (type == 'md' || type == 'markdown') {
        var converter = new showdown.Converter();
        var html = converter.makeHtml(data);
        transData = HtmlToJson.html2json(html, bindName);
        console.log(JSON.stringify(transData, ' ', ' '));
    }
    transData.view = {};
    transData.view.imagePadding = 0;
    if (typeof (imagePadding) != 'undefined') {
        transData.view.imagePadding = imagePadding
    }
    var bindData = {};
    bindData[bindName] = transData;
    that.setData(bindData)
    that.wxParseImgLoad = wxParseImgLoad;
    that.wxParseImgTap = wxParseImgTap;
}

// 图片点击事件
function wxParseImgTap(e) {
    var that = this;
    var nowImgUrl = e.target.dataset.src;
    var tagFrom = e.target.dataset.from;
    if (typeof (tagFrom) != 'undefined' && tagFrom.length > 0) {
        wx.previewImage({
            current: nowImgUrl, // 当前显示图片的http链接
            urls: that.data[tagFrom].imageUrls // 需要预览的图片http链接列表
        })
    }
}

/**
 * 图片视觉宽高计算函数区
 **/
function wxParseImgLoad(e) {
    var that = this;
    var tagFrom = e.target.dataset.from;
    var idx = e.target.dataset.idx;
    if (typeof (tagFrom) != 'undefined' && tagFrom.length > 0) {
        calMoreImageInfo(e, idx, that, tagFrom)
    }
}

// 假循环获取计算图片视觉最佳宽高
function calMoreImageInfo(e, idx, that, bindName) {
    var temData = that.data[bindName];
    if (temData.images.length == 0) {
        return;
    }
    var temImages = temData.images;
    //因为无法获取view宽度 需要自定义padding进行计算，稍后处理
    var recal = wxAutoImageCal(e.detail.width, e.detail.height, that, bindName);
    temImages[idx].width = recal.imageWidth;
    temImages[idx].height = recal.imageheight;
    temData.images = temImages;
    var bindData = {};
    bindData[bindName] = temData;
    that.setData(bindData);
}

// 计算视觉优先的图片宽高
function wxAutoImageCal(originalWidth, originalHeight, that, bindName) {
    //获取图片的原始长宽
    var windowWidth = 0, windowHeight = 0;
    var autoWidth = 0, autoHeight = 0;
    var results = {};
    wx.getSystemInfo({
        success: function (res) {
            var padding = that.data[bindName].view.imagePadding;
            windowWidth = res.windowWidth - 2 * padding;
            windowHeight = res.windowHeight;
            //判断按照那种方式进行缩放
            console.log("windowWidth" + windowWidth);
            if (originalWidth > windowWidth) {//在图片width大于手机屏幕width时候
                autoWidth = windowWidth;
                console.log("autoWidth" + autoWidth);
                autoHeight = (autoWidth * originalHeight) / originalWidth;
                console.log("autoHeight" + autoHeight);
                results.imageWidth = autoWidth;
                results.imageheight = autoHeight;
            } else {//否则展示原来的数据
                results.imageWidth = originalWidth;
                results.imageheight = originalHeight;
            }
        }
    })
    return results;
}

function wxParseTemArray(temArrayName, bindNameReg, total, that) {
    var array = [];
    var temData = that.data;
    var obj = null;
    for (var i = 0; i < total; i++) {
        var simArr = temData[bindNameReg + i].nodes;
        array.push(simArr);
    }

    temArrayName = temArrayName || 'wxParseTemArray';
    obj = JSON.parse('{"' + temArrayName + '":""}');
    obj[temArrayName] = array;
    that.setData(obj);
}

/**
 * 配置emojis
 *
 */

function emojisInit(reg = '', baseSrc = "/wxParse/emojis/", emojis) {
    HtmlToJson.emojisInit(reg, baseSrc, emojis);
}

module.exports = {
    wxParse: wxParse,
    wxParseTemArray: wxParseTemArray,
    emojisInit: emojisInit
}


